Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a648e4aca69281e787905f6c199af27111b98d20f8b082b21b72cfec29d7f490' 
  AND token = 'CqVqU5z3gOsGhaN3f5ujcunEIyLRKWHt3NVQ8FWxPeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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