Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'faf0864939fab20857cf5e4e1e1d1e0abc6efc9f882c1002d75277776ecc4f22' 
  AND token = 'r15dKI/t65xZIMa76vPY1Dm4gMIfjYfqrz89GJeKzGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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