Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3835407fd558486aa19bb9ac82d872a163932cfff72787bdf4191d545d82eb32' 
  AND token = '6IETg1W1eL+pyQ/qcHxifV7Ca2xxrtlqqMazqoID/OE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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