Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17443e6f99a46172a016df30e1afb4d9ed59a80229883e87189a0e8e98fdd0ad' 
  AND token = 'tEVXe8HQOBDkOv0CstqZ7xrEaYecpSetKT7TdDq3djI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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