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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d2a04781d0a72b331097b3db4bcfeef9351e46ad4c770eea5675a6d266bc188' 
  AND token = 'IjW/edXMK0W7IWz/y/do0KKHHCjTa2z4u+gFCWCCy6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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