Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fad7a06c15e6fcaae84ae03554c951be083818ee23c5947f271f96df31c2c7e' 
  AND token = 'Z464CphB54iGXA9COkzN5LM5czo1Slq65O/pi39XXO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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