Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8243c116df2e24403ddcc481bb768cf5f09f3a76f2324b646922fd6ae6ceae79' 
  AND token = 'T0cMA8xzGrLFQxLQC0J7qfwcI20paEOMFpiwZQ7NQdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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