Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '376f04aaf9c3d2a5f6159adb9838f48f3975837b5e63001bcae93e4ee6c9bb26' 
  AND token = 'apfs/mJk1Ghvu+FTCcaSi7GS/lt33LgtqytFYtS5CFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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