Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '044488267e4f664892ca104b8d1308c9ed6a656f1586dd2b69321bdddc24ec9a' 
  AND token = 'bclD/L0Xb65b1Lm0WI5A5Mkxz06LjCtgMSm67eJHHPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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