Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49405e958883d4134b79a65bb0a7d710eb21d39092294bc6d5b689cb43ab0ba9' 
  AND token = 'W3SEzYV53OcRUwIJKsJwWx84H74r63jnroYBCphj1Ms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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