Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89c0363ceb1a935385e79d0c0965dc331e28e0f01d36f4126b401a29805e57e4' 
  AND token = 'UwJDYgtbVBSNIBBkAtNdLin26Ky6pOP4+5eIGQJ9+FE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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