Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47ee4192646b66a3ff5ca7420834b074e16681fa3470ef7b3f4cc5c967d43405' 
  AND token = 'EF8OOeQi7ZssL2G//lisLaQ1tJNn7B80QaKJ5jnJxp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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