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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed2272546087581eac362455ea638688b66e2027cd11ec4572c60770858bedae' 
  AND token = 'B0aqafPGXaqJ0QKVEAN+7LoVsug2c+n7KH2FYaKKz+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00092

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}