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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2695181f645df2bbba41367d846253ca66474e0240a9387073f95586a6b9f704' 
  AND token = 'ztDrhusissWuUEonG4Sozu1guXTgcri7WaUzTJ0NDDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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