Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a525cb0ccffc0440573e8b42eac42cd8c92cb652e87ee13a74ddfedd478cc67' 
  AND token = 'faPuM2ccFEd7bxwCBb7WCTtQKYZgMn1QFKMHT16PwGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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