Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e638ff47ae082f35c1ca2f23d6d6fd41b492092ac4860c275c51d3cad4c765eb' 
  AND token = 'Gau+cHyX3ISACMIi2b2qhy8gnCaY6Xntog2B06Dkt3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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