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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28f9f742f725c1479fb985684924deb6efe686f4885f6708f9ad7159c7d6cf45' 
  AND token = 'YZ1Fsh553Jvg8nrYVDOZPA2a9ysBL83YPCGA1NaB2N4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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