Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c45871d0c201403bbb1ae16d8667424d4d0f1063a5df63e626d5d6f64c69b23d' 
  AND token = 'HVxj74thYmBL15U20ehMqCyj00Jw9NPCopG4AMpRRjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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