Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74214e174bcf1edb0f8194a03f476cf77821edf210c39f09031d1b07836c3fcf' 
  AND token = 'zKSBCxa76niPHCp0k4q+bfFsdv7JXEu27HBHAr4WmF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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