Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac0fcd3732d88af47e4148c6b031652b3108263483c8cee6fc8bf1c2755e3fb7' 
  AND token = 'LQ3fJWb38Fr169OTpla6DbScWBp/JvuKI1z2am/OTVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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