Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f57953faa19c04759f1b2d02ecc9d944a26a498e86cba2935dfb57f6fb476560' 
  AND token = 'jGrIN4wkvSV68QEYykt46tu5QTXUSMljNo5eRIbMuUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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