Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af0abc607d4d045f831ca94bbc8c3313b7850ecf2dfb7d711e390feec9fd7b02' 
  AND token = '4h0hi5oRTxuFOvqOC46oLoz3w/jIlDA5OI8kjiMfQt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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