Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb2b3209a3e0163770fda13fdd2d664f26e376b01d9ac4ac11e7fe8b893fc1aa' 
  AND token = 'HDf57/jegr9XxCij5chftAZ8roNqVSC7liCkkswcYeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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