Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a38e3799bfb9a3ab3b9d95ea9e6c6fa19db303b2cf89d8901dc722a576ea1ac0' 
  AND token = 'TP8UH7gKPeZWFRDhDYhCcPBMvtccLPawkkkxngpujxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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