Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a8f6a98fd769f57a50a0d2df0890bb0d8f92deee33b128a05d86b6c16860b987' 
  AND token = 'sjnhbT9P+ChIu4E1DdQjjgmS5dXzDOJgNJucC6rt6iA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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