Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b243131f8fb0d2e1b7657a7fd403bfe7c549f354eba716ad0c937a74a8927f4' 
  AND token = 'VPY412ZocKl8ktughnaF38zfmXHOAuPedC2Wbp5qAf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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