SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77cb0934a90de2ba8f44b95942bb63a1ff1ec9fe05affc11457235ffd4338cc3' 
  AND token = 'BlZ8an/eIeJvCp/4Or6yYUh4Uvq45ytmCsn2cVjHXWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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