Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f164ca46ef7e9a5fc3a3e2ca32c0fe1f7810ba469d42273fb75880bc562e0633' 
  AND token = 'aNHPWv7w9N07nPsoBNNAZr8QHKprYuBELethGbzpdDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}