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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04966b7fee4d7fead7a6c0fbe1416fa9e0e8b1203bbfff1f972dd08db41600f4' 
  AND token = 'JWKPIlNCXrrrseLpoE9Sow5vQI7F2opD1/WU++JG2Lc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00143

JSON explain

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