Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '336b0b3e43389c3ba1f26657ea6c4db5bde8617b919b25f16656a1bca4f3055b' 
  AND token = 'IrxVpzX35yfzpvTnAOxSYM3kcdE6hpl0Gik/Qp/vJBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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