Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf15fae9119cdbd02d7b991ecdb98e29e987c9172422c577c286ce586643894b' 
  AND token = 'Enjo7UM1iZreKP252DznX3sN7DtWdgrZTQ0xJ0JbUCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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