Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e1b9466d341aaeebdf4d396da5c6dafc1f49fa7f478072933d76e54a6724043' 
  AND token = 'R4w1BWwaaEn08aN2tP6gP/q8rd4oK/MKk+dMzLgdg3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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