Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cdaca6320428c79d71ceb0b7c15c22200aa2b5aa79669769cc140e23cf82322' 
  AND token = 'ujtFja/WtHHZ/87LPRG1Gjy+hcjAxLRXJSkodbVYJec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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