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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1f00eb23b27830f97d1d5c5392b187bd93a0c52a66ed0d54c96583807f6e2e1' 
  AND token = '2DN3Bmjt8hIB+OOnGHTjFAdo8qyN5zJSLJTGoAqvmLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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