Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acc31ac14677385f033085586aebacac3b9dabc37d50d1ef16ee8932f961fd3b' 
  AND token = 'TjSAigBkPbtbs/CzyBSJGbUsKSRQadzhwvThoa2k9c8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}