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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2662d7bc26c803852e1a79cf8e22296f11ef0e6b76aeb5b86159067debce15f' 
  AND token = 'gmB9EhMi6smHdm8dVJwK4XSDKkJiZPBSMCqZg2Ngv5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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