Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '805a2d46937fcee778016afdbabf34a135d4e65864f611efb0f672707bbb4416' 
  AND token = 'FwxLlv6l9UKp+68OMsRQen7BpNEinxW0+sSFCYumZMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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