Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2182b8c5660208bdb3110a75d2dfbd7ecb1a424b4128d46e497657300142ed8' 
  AND token = 'Ww8Mp+rD8VMudjXhvBzNOw49O4zz4dXXgYGSXgaA/gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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