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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97ed2a17f1abb5a2e0d7aa4ba95cf4c93a671b10faec7fc8a27259822533ecd8' 
  AND token = '/KMp80ZCvaWPVBU3/PVcERulR91Z1rYa4GEWziJRWrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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