Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e1b3eb8b389c81ce81cf502a42856540209bf9591e12365b3e2c76a19d85ffc' 
  AND token = 'z6Np07DkPwc4iDJzD5/bno+wm0Y7OSDXnZzAW0v5qas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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