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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a835eb1e2dc5e3a5b3dc52605bdae2fde08ae8ff7f163c8277f59425165d2ac6' 
  AND token = 'Br3NA0RcMqjQWeUcVU7QYHeZpAXSYNmTrIbUz4n03XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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