Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '206c1de8880974d4b59215892d7fe2a161b9eb2c64737e107b7d3fd60db966cf' 
  AND token = 'ga5dNh/JjSP2sAMWvwo8DMLGJ6IVjaahLyaN7bIFiEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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