Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2e401a6f69f21506346a6c5e39c47fc9a26b4c0ae967e6cd717a40c6c2354dd' 
  AND token = '+6J1SUv2tH50T5LtumRgJkU6/9vg3z2YJDUMjUtcKsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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