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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa119d4c6bd455c7682a24e24b83f4f65f6545e334af9925abc17f4b5bf1ac20' 
  AND token = 'aIFsX9yKXXtsSgIxlbnJTeLAg1zoSK++BrjK04rDAeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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