SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90318c89dec95ddf732f69a7abc6225d5df6d908d7d8c88ddd7a7f2a49939923' 
  AND token = 'u4vz1sS5cquhKgr6R6G+hZ7Jj4hrvfPRGCgsS3r9C2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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