Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3016c112e7bc1ce98be5bd371fd60eef37cd48bb1731b69ac090c9de6ec7ee12' 
  AND token = 'V6Bq3YkxbrLb37FEM+KIDQqFloiu/VYyyAGXWzYmOEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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