Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db5177ff6fa892c43ff2c9a70558d108494a79f8c00f2f6fa1ff28a67e88f670' 
  AND token = 'GZcJ2Ss7njDdtm6zYEypxb92aDl13Yi3qia9fzrdCuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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