Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90362846db888730aab5d1048951e736712551da3659b4c0b225e494c35ef0e7' 
  AND token = 'QhNOjDs6eTtHjcutwcsBk057UfdmuM6xgYDcyxLWSZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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