Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a7530cdb8da65b0284e811d06c0f4ce04244b168e2a7684c8412f46caf972967' 
  AND token = 'NILEOtUCdOC0nv2g1a8vj/3FNExjMlIxncMvIwndm0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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