Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aac46b593fe1ad121c1fa78012b5634d541a9a3761469e161d61a3c021e6630' 
  AND token = 'rRFZFUsnm3anaR0ESCybg2wkiEFUYwmTIbxNnGVFAEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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