Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dbba84acfd8ba84afd6ecb2920450e1556aac3de6e865ea6301912818c7ad5f' 
  AND token = 'FZlgByy2XUtwa/G+0ZtF2s0eTWKiZcjSBWjY3lr3K/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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