SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d658605b97c129c0bf4dfe94538757aca1a6369dfb3c4f4937bef071782674d' 
  AND token = 'z6D+ZF/KnSZa7r6FQLVwluHAdik9IJJhmlGpJf7+r9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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