Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39b9a3467d4bbe52e8fb1c2c5d37528902d3a92f99f7b32e33debb834c491150' 
  AND token = 'VfrTGsoEcyR8X2pPUJtv0RuSJWCmlBUb3V7ByNDgKj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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