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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06c38ddeab62a86edb9d73c1e52652c7987d42ed58abb57172f6c2c1d2fca58c' 
  AND token = 'G0DvWytGEogITJ54OmwenX/5OQhX6Qzv5wEJHSr7x0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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