Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cb481d2097079a9efbde9f32d30b939f28e04ded39bed6e44150bc8f0df4954' 
  AND token = 'Y2Q/FMT1ozyh1aKbhM2ROrS8EsxHEOKS3XJxvj0VKzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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