Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fdac62cef4d56e0c06f37a60f281eb31d72a6d15e12864cfb1425804631dab1' 
  AND token = '7Ql18zXgKeq/7qfyPshfPA5yEDNgaz14Hy/pzaxB0oY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}