Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '052e6849d5d4f1e95328f3e15ea0deeeb54cbcd80c4a22e88383442b53ed6b68' 
  AND token = 'f8WtHA3j2wPNMul1hFlpAE1/fy3SRsq6u3iX+7+Fc9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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