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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f542b8149452b9cd5a8ac39d7cb14c2c9219e9d4a1f29c6eacace95eb9359ec' 
  AND token = '8ZTIOglmtWNj56EvBdlmJsqvEaVyUF0X25v2MpRc6cQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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