Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55982f46afdc9e2f3b0992e7d91fbb30715b5ed04103b3168542307eb130bbd9' 
  AND token = 'GYz4Ds4kPTUo4g6NwcoJj4rmMVMCmHLWSM3WIg5hM/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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