Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe8a1c8db32c4078abefe6a718fe179d5261d861e2d0d5b48904a0fdfb4b7d87' 
  AND token = 'hADkL266AW8nHrDgqodAUkTtdu5c0uIjHjVA27Xsx3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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