Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a69c883b88d12699089f04d77a2e406397df2562f23edfba4d41ec9cf818a84b' 
  AND token = 'f9wWZwU0bMS/VkE+AY4MyymuiWfNehvc3A4T0AnKRgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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