Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd72ed2d9e4eadcc38b20da26cbfc51175e425b6817a86d0c67142eba850ddc6' 
  AND token = 'lGhn6eG9CmDCKsvYerWJavmg7pyQrvPun8R9FPeCayg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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