Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e255cb58b3ed7172132cad8e2c651707c2e5de6cdf7da019f9537366153d748c' 
  AND token = 'wnnjTQf/iLAw3wgP/7Id+LX6tbgjWO/2svxHHR/tC3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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