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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32a367eb74bbb83e119e1b35d9d84893dc5f6c2fe7fa3d7b39fd2b209e8eedb9' 
  AND token = 'AnTuv9q3vo9I4AxiY6qxIi75xeWoR0GmlhguqUOpFpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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