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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e247e8739398e7b17527dd72cced7565bccf6f95e80c8c03bb16b5040c9e052' 
  AND token = '0K78gQIIap8bDh1ew9AdNmL9i3Ii24rhegjkHmC0Sf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00113

JSON explain

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