Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '757b4f343e96147cdd65b1d52e3321d13a29d99e03eaa44653e2f9ac7c7bfa0e' 
  AND token = 'R8Ideq+Pd3BrKU9hw3iY2cY96NQGqxq25gc3avQviuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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